Operational Benefits and Design Approaches for Combining JTIDS and GPS Navigation

Walter R. Fried

Abstract:	This paper describes the Joint Tactical Information Distribution System (JTIDS) Navigation Function and the Global Positioning System (GPS), emphasizing their technical similarities and differences. Based on these, the paper discusses the operational benefits, performance, and design approaches for combining the navigational and time data from these two systems. Both JTIDS and GPS are time synchronous, spread spectrum systems which provide high accuracy navigation data through the use of time-of-arrival measurements and pseudo-ranging techniques. Both are subject to Geometric Dilution of Precision (GDOP) effects, though under different conditions; and both are highly resistant to interference, though to different degrees. JTIDS is more a tactical or local system}while GPS is global in nature. Exchanging data between the two systems, under certain constraints, therefore has the potential of great performance and operational benefits with respect to system availability under a variety of operational scenarios and interference conditions. These benefits and proposed methods for combining the data from the two systems are described in the paper.
Published in:	Proceedings of the 1984 National Technical Meeting of The Institute of Navigation January 17 - 19, 1984 San Diego, CA
Pages:	210 - 219
Cite this article:	Updated citation: Published in NAVIGATION: Journal of the Institute of Navigation
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